it really compared nothing to what happened in russia yesterday. listen. this spectacle in the skies above central russia ended with chaos and confusion. first this bright flash, then a deafening crash. students ran away from the windows. office workers ducked for cover. and this man shielded his head from falling debris. the meteor left a trail of damage. powerful shockwaves blew out windows and sent glass flying everywhere. hospitals are packed >> translator: mainly incised and contused winds due to windows and window frames breaking and flying around. you see as a result how many people are here. >> reporter: the blast injured at least 1,000 people. most of the injuries are minor. >> windows and doors were blown out of around 3,000 buildings. that's especially rough when temperatures are near freezing now. emergency officials are there right now, assessing the damage. >>> after a day after hearing about that blast in russia, imagine what people in san francisco thought about that. experts say they see meteors like this quite often but often just drop ov